For over two decades, Raydafon Group has been at the forefront of electric mobility innovation. Our commitment to engineering excellence is embodied in our flagship product: the high-performance Rear Hub Motor. Designed for seamless integration, durability, and unparalleled efficiency, this motor represents the culmination of years of research and real-world testing.
A Rear Hub Motor is an electric motor integrated directly into the rear wheel's hub. This ingenious design eliminates the need for chains, belts, or complex gear systems, delivering power directly to the wheel for a smooth, quiet, and low-maintenance riding experience. It's the preferred choice for a vast range of electric vehicles, from sleek city e-bikes and robust mountain e-bikes to efficient scooters.
Not all hub motors are created equal. Raydafon Group motors are engineered with precision, using premium materials and advanced control systems. Here’s what sets us apart:
To make an informed decision, understanding the core specifications is key. Below are the detailed parameters for our most popular models.
| Model | RHD-350W | RHD-500W | RHD-750W | RHD-1000W |
|---|---|---|---|---|
| Rated Power | 350 Watts | 500 Watts | 750 Watts | 1000 Watts |
| Peak Power | 600W | 850W | 1200W | 1500W |
| Rated Voltage | 36V / 48V | 36V / 48V | 48V | 48V |
| Max Torque | 40 Nm | 55 Nm | 80 Nm | 95 Nm |
| Max Speed* | 25 km/h (15.5 mph) | 32 km/h (20 mph) | 45 km/h (28 mph) | 50+ km/h (31+ mph) |
| Wheel Size Compatibility | 26", 27.5", 700C | 26", 27.5", 700C | 26", 27.5", 29" | 26", 27.5", 29" |
| Weight (Motor only) | 3.2 kg (7.0 lbs) | 3.8 kg (8.4 lbs) | 4.5 kg (9.9 lbs) | 5.1 kg (11.2 lbs) |
| Ideal Use Case | City Commuting, Flat Terrain | Urban & Light Trail, Moderate Hills | Off-Road, Mountain Biking, Steep Hills | High-Performance, Cargo Bikes, Heavy Loads |
*Speed may vary based on local regulations, battery configuration, rider weight, and terrain.
Q: How difficult is it to install a Raydafon rear hub motor on my existing bike?
A: Installation is designed to be straightforward for anyone with basic mechanical skills. The kit includes the motor wheel (usually pre-laced with spokes into a rim), a controller, a battery (optional), a pedal assist sensor, a throttle, and all necessary connectors and hardware. You'll replace your existing rear wheel with the motor wheel, mount the controller and battery, and connect the cables. Detailed, step-by-step installation manuals and video tutorials are provided by Raydafon Group. If you are unsure, we recommend consulting a local bike mechanic.
Q: What is the difference between a geared and a direct-drive hub motor?
A: Raydafon Group primarily focuses on high-efficiency geared hub motors. A geared motor uses an internal planetary gear system to reduce the motor's RPM and increase torque. This makes it lighter, more efficient at hill climbing and acceleration, and it often features a "freewheel" sensation when coasting. A direct-drive motor has no internal gears; the outer shell spins directly. It is typically heavier, offers regenerative braking more effectively, and can be very durable but may be less efficient on hills. Our geared motors offer the best balance of weight, power, and efficiency for most riders.
Q: How does the waterproof rating (IP65) protect my motor?
A: The IP65 rating is a critical industry standard. "IP" stands for Ingress Protection. The first digit (6) indicates complete protection against dust ingress. The second digit (5) means the motor can withstand low-pressure water jets from any direction. In practical terms, your Raydafon motor is fully protected against rain, snow, splashing from puddles, and high-pressure washing (when done cautiously). You can confidently ride in wet conditions without worrying about internal damage.
Q: Can I use a Raydafon hub motor with any battery?
A: Compatibility is crucial for safety and performance. Our motors are designed to work with specific voltage ranges (e.g., 36V or 48V). You must use a battery that matches the motor's rated voltage. The battery's capacity (measured in Amp-hours, Ah) will determine your range. We strongly recommend using a high-quality lithium-ion battery from a reputable supplier, and Raydafon Group offers certified battery packs that are perfectly matched to our motor and controller systems, ensuring optimal performance, safety, and longevity.
Q: What maintenance does a rear hub motor require?
A: One of the greatest advantages of a hub motor is its low maintenance. Being a sealed unit, the internal components require no regular servicing. Primary maintenance involves checking the wheel spokes for tension after the first 100 miles, ensuring the axle nuts are tight, and keeping the electrical connectors clean and dry. The motor itself is virtually maintenance-free. You will maintain the rest of your bike as usual—brakes, tires, chain (if using pedal assist).
Q: Is a 750W or 1000W motor legal for use on public roads?
A: Electric bike laws vary significantly by country, state, and even local municipality. In many regions in the United States, a 750W motor is the federal limit for a "Class 3" e-bike (with a speed cap of 28 mph with pedal assist). A 1000W motor often falls into a different category, sometimes intended for off-road or private land use only. It is the rider's responsibility to know and comply with all local laws regarding motor power, top speed, helmet use, and where e-bikes are permitted. Raydafon Group provides motor power ratings; how you use it must align with your local regulations.
Q: Does the motor provide assistance only when pedaling?
A: Our systems offer flexibility. They come standard with both a Pedal Assist System (PAS) and a thumb or twist throttle. In PAS mode, the motor provides power proportionally to your pedaling effort, making riding feel natural and extending range. With the throttle, you can engage motor power on demand without pedaling, which is helpful for starting from a stop or taking a break. You can choose to use either mode based on your preference and local laws (some areas restrict throttle-only operation).
The versatility of the Raydafon Group Rear Hub Motor makes it suitable for a wide spectrum of applications:
Selecting the perfect motor depends on your specific needs:
At Raydafon Group, we are dedicated to pushing the boundaries of electric propulsion. Our Rear Hub Motor is more than just a component; it's the heart of a smarter, more enjoyable, and sustainable ride. Engineered for reliability and backed by decades of expertise, it is the trusted choice for riders and manufacturers worldwide.
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